Innovative methods for teaching verbs in english grammar

(They drive. / They drove.)

2. Tense + Modal + Verb	present conditional / past conditional (They will drive. / They would drive.)
3. Tense + Perfective + Verb	present perfect / past perfect (They have driven. / They had driven.)
4. Tense + Progressive + Verb	present progressive / past progressive (They are driving. / They were driving.)
5. Tense + Modal + Perfective +Verb	present perfect conditional / past perfect conditional (They may have driven. / They might have driven.)
6. Tense + Modal + Progressive + Verb	present progressive conditional / past progressive conditional (They will be driving. / They should be driving.)
7. Tense + Perfective + Progressive + Verb	present perfect progressive / past perfect progressive (They have been driving. / They had been driving.)
8. Tense + Modal + Perfective + Progressive + Verb	present perfect progressive conditional / past perfect progressive conditional (They will have been driving. / They should have been driving.)

combinations for constructing sentences using a verb in either the past form or the present form for all eight items and then combinations for all possible inclusions of aspect

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and mood (p. 37). In Table 2, a description and example sentences have been added to each item to illustrate the combinations.
Table 2
Possible Combinations for Constructing Sentences
Note. Adapted from Doing Grammar by M. Morenberg, 1991, p. 37.
By presenting the two-tense approach in this manner, teachers and learners can see that two fundamental factors are occurring: there is always tense form, either past or present, on the first verb in the sentence of each of the eight items, and there is always a main verb. Nowhere in Morenberg’s (1991) literature does he suggest that this schematic represents eight tenses.
The schematic is only showing that with this use of two-tense forms and the eight constructions, any grammatically correct English sentence can be realized. As Morenberg points out, a modal auxiliary always shows conditional mood (p. 28), so by using the term conditional, there is also an elimination of the contradictory terminology of future and past being part of the same description.